[3] | 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org/ |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #ifndef __PlatformInformation_H__ |
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| 30 | #define __PlatformInformation_H__ |
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| 31 | |
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| 32 | #include "OgrePrerequisites.h" |
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| 33 | |
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| 34 | namespace Ogre { |
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| 35 | // |
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| 36 | // TODO: Puts following macros into OgrePlatform.h? |
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| 37 | // |
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| 38 | |
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| 39 | /* Initial CPU stuff to set. |
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| 40 | */ |
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| 41 | #define OGRE_CPU_UNKNOWN 0 |
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| 42 | #define OGRE_CPU_X86 1 |
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| 43 | #define OGRE_CPU_PPC 2 |
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| 44 | |
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| 45 | /* Find CPU type |
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| 46 | */ |
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| 47 | #if (defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))) || \ |
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| 48 | (defined(__GNUC__) && (defined(__i386__) /*|| defined(__x86_64__)*/)) |
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| 49 | # define OGRE_CPU OGRE_CPU_X86 |
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| 50 | |
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| 51 | #elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE && defined(__BIG_ENDIAN__) |
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| 52 | # define OGRE_CPU OGRE_CPU_PPC |
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| 53 | #elif OGRE_PLATFORM == OGRE_PLATFORM_APPLE |
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| 54 | # define OGRE_CPU OGRE_CPU_X86 |
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| 55 | |
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| 56 | #else |
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| 57 | # define OGRE_CPU OGRE_CPU_UNKNOWN |
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| 58 | #endif |
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| 59 | |
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| 60 | /* Find how to declare aligned variable. |
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| 61 | */ |
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| 62 | #if OGRE_COMPILER == OGRE_COMPILER_MSVC |
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| 63 | # define OGRE_ALIGNED_DECL(type, var, alignment) __declspec(align(alignment)) type var |
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| 64 | |
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| 65 | #elif OGRE_COMPILER == OGRE_COMPILER_GNUC |
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| 66 | # define OGRE_ALIGNED_DECL(type, var, alignment) type var __attribute__((__aligned__(alignment))) |
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| 67 | |
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| 68 | #else |
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| 69 | # define OGRE_ALIGNED_DECL(type, var, alignment) type var |
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| 70 | #endif |
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| 71 | |
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| 72 | /** Find perfect alignment (should supports SIMD alignment if SIMD available) |
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| 73 | */ |
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| 74 | #if OGRE_CPU == OGRE_CPU_X86 |
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| 75 | # define OGRE_SIMD_ALIGNMENT 16 |
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| 76 | |
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| 77 | #else |
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| 78 | # define OGRE_SIMD_ALIGNMENT 16 |
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| 79 | #endif |
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| 80 | |
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| 81 | /* Declare variable aligned to SIMD alignment. |
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| 82 | */ |
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| 83 | #define OGRE_SIMD_ALIGNED_DECL(type, var) OGRE_ALIGNED_DECL(type, var, OGRE_SIMD_ALIGNMENT) |
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| 84 | |
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| 85 | /* Define whether or not Ogre compiled with SSE supports. |
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| 86 | */ |
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| 87 | #if OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_X86 && OGRE_COMPILER == OGRE_COMPILER_MSVC |
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| 88 | # define __OGRE_HAVE_SSE 1 |
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| 89 | #elif OGRE_DOUBLE_PRECISION == 0 && OGRE_CPU == OGRE_CPU_X86 && OGRE_COMPILER == OGRE_COMPILER_GNUC |
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| 90 | # define __OGRE_HAVE_SSE 1 |
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| 91 | #endif |
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| 92 | |
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| 93 | |
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| 94 | #ifndef __OGRE_HAVE_SSE |
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| 95 | # define __OGRE_HAVE_SSE 0 |
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| 96 | #endif |
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| 97 | |
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| 98 | |
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| 99 | |
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| 100 | |
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| 101 | /** Class which provides the run-time platform information Ogre runs on. |
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| 102 | @remarks |
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| 103 | Ogre is designed to be platform-independent, but there some platform |
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| 104 | and run-time environment specific optimised functions are built-in |
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| 105 | for maximise performance, and those special optimised routines are |
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| 106 | need to determine run-time environment for select variant executing |
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| 107 | path. |
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| 108 | @par |
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| 109 | This class manages that provides a couple of functions to determine |
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| 110 | platform information of the run-time environment. |
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| 111 | @note |
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| 112 | This class is supposed to use by advanced user only. |
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| 113 | */ |
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| 114 | class _OgreExport PlatformInformation |
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| 115 | { |
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| 116 | public: |
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| 117 | |
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| 118 | /// Enum describing the different CPU features we want to check for, platform-dependent |
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| 119 | enum CpuFeatures |
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| 120 | { |
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| 121 | #if OGRE_CPU == OGRE_CPU_X86 |
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| 122 | CPU_FEATURE_SSE = 1 << 0, |
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| 123 | CPU_FEATURE_SSE2 = 1 << 1, |
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| 124 | CPU_FEATURE_SSE3 = 1 << 2, |
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| 125 | CPU_FEATURE_MMX = 1 << 3, |
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| 126 | CPU_FEATURE_MMXEXT = 1 << 4, |
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| 127 | CPU_FEATURE_3DNOW = 1 << 5, |
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| 128 | CPU_FEATURE_3DNOWEXT = 1 << 6, |
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| 129 | CPU_FEATURE_CMOV = 1 << 7, |
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| 130 | CPU_FEATURE_TSC = 1 << 8, |
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| 131 | CPU_FEATURE_FPU = 1 << 9, |
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| 132 | CPU_FEATURE_PRO = 1 << 10, |
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| 133 | CPU_FEATURE_HTT = 1 << 11, |
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| 134 | #endif |
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| 135 | |
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| 136 | CPU_FEATURE_NONE = 0 |
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| 137 | }; |
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| 138 | |
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| 139 | /** Gets a string of the CPU identifier. |
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| 140 | @note |
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| 141 | Actual detecting are performs in the first time call to this function, |
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| 142 | and then all future calls with return internal cached value. |
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| 143 | */ |
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| 144 | static const String& getCpuIdentifier(void); |
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| 145 | |
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| 146 | /** Gets a or-masked of enum CpuFeatures that are supported by the CPU. |
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| 147 | @note |
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| 148 | Actual detecting are performs in the first time call to this function, |
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| 149 | and then all future calls with return internal cached value. |
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| 150 | */ |
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| 151 | static uint getCpuFeatures(void); |
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| 152 | |
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| 153 | /** Gets whether a specific feature is supported by the CPU. |
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| 154 | @note |
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| 155 | Actual detecting are performs in the first time call to this function, |
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| 156 | and then all future calls with return internal cached value. |
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| 157 | */ |
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| 158 | static bool hasCpuFeature(CpuFeatures feature); |
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| 159 | |
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| 160 | |
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| 161 | /** Write the CPU information to the passed in Log */ |
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| 162 | static void log(Log* pLog); |
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| 163 | |
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| 164 | }; |
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| 165 | |
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| 166 | } |
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| 167 | |
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| 168 | #endif // __PlatformInformation_H__ |
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